How do 2 pages generated from servlets pass value?

Hi, I've a parent HTML page(generated form servlet) from which i'm invoking a child window (also genearted from another servlet) on pressing of a button and i need to both these pages to communicate with each other. The child window has a certain set of codes which when selected should populate a combo box in my parent html window. How do i go abt doing this without re-loading my parent servlet or html page? plz help me Thanking you in advance... Aman Rustogi

/*-------- bla.html ------*/ function populateParent() { window.opener.document.myform .... } I think it is something like that. I any case this can be done in Javascript and does not require servlets. Cheers